From c4498ccaf92d6cb0490033169fe034cff564bb72 Mon Sep 17 00:00:00 2001
From: Nick Hollon <nick.hollon@langchain.dev>
Date: Fri, 24 Apr 2026 13:27:38 -0400
Subject: [PATCH] chore(core): mark stream_v2/astream_v2 as beta (#36992)

---
 libs/core/langchain_core/language_models/chat_models.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/core/langchain_core/language_models/chat_models.py b/libs/core/langchain_core/language_models/chat_models.py
index c38a9d3470f..2f5df7a3e46 100644
--- a/libs/core/langchain_core/language_models/chat_models.py
+++ b/libs/core/langchain_core/language_models/chat_models.py
@@ -16,6 +16,7 @@ from langchain_protocol.protocol import MessageFinishData
 from pydantic import BaseModel, ConfigDict, Field, model_validator
 from typing_extensions import Self, override
 
+from langchain_core._api import beta
 from langchain_core.caches import BaseCache
 from langchain_core.callbacks import (
     AsyncCallbackManager,
@@ -970,6 +971,7 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
 
     # --- stream_v2 / astream_v2 ---
 
+    @beta()
     def stream_v2(
         self,
         input: LanguageModelInput,
@@ -1130,6 +1132,7 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
         stream.bind_pump(pump_one)
         return stream
 
+    @beta()
     async def astream_v2(
         self,
         input: LanguageModelInput,